Andrew Romanoff, trying to knock off White House darling Michael Bennet in Colorado’s Democratic Senate primary, said recently he wants “to ground this campaign in the grassroots. That’s the big difference, in my view; it’s the difference between a grassroots campaign and an astroturf campaign.”

And who’s running an astroturf campaign, in Romanoff’s view? It’s Organizing for America, the successor to Barack Obama’s presidential campaign that now works within the Democratic National Committee.

“You’ll see a lot of the astroturf headed our way because the national Democratic Party, which has decided, despite the advice of a lot of party leaders here, to weigh in,” said Romanoff in late May. “They’re going to be launching their own road show, beginning I think on June 5. Folks from Organizing for America are going to try to come knock on doors and introduce themselves to Colorado.”